Vol. 11, Issue 3 (2022)

Author(s):
Anurag Kumar Singh, JP Singh, SK Verma, Rajesh Kumar Singh, Rajesh Kumar Chauhan, Rakhi Mahto, Shashank Shekher Singh and Uday Pratap Singh

Abstract:
A field experiment was conducted to study the effect of herbicide mixtures and dormancy breakers on growth and yield of wheat during two consecutive rabi seasons of years 2018-19 and 2019-20, respectively. The experiment was laid out in split plot design with five herbicide treatments in main plot viz. Clodinafop-propargyl 60 g a.i. ha^-1 + Carfentrazone-ethyl 20 g a.i. ha^-1, Sulfosulfuron 25 g a.i. ha ^-1 + Metsulfuron-methyl 4 g a.i. ha^-1, Isoproturon 1000 g a.i. ha ^-1 + 2,4-D 500 g a.i. ha^-1_, Weedy check and 2-Hand Weeding (25 and 45 DAS) and four dormancy breakers in sub plots viz. Control, Potassium nitrate (KNO₃) @ 24 kg ha^-1, Sodium azide (NaN₃) @ 11.2 kg ha^-1 and Gibberellic acid (GA₃) @ 160 g ha^-1. The results reported that the higher growth and yield parameters viz. plant height, number of tillers, dry matter accumulation, grain yield, straw yield and biological yield were recorded under herbicidal mixture of Sulfosulfuron 25 g a.i. ha^-1 + metsulfuron 4 g a.i. ha^-1. Among the dormancy breakers, Gibberellic acid (GA₃) 160 g ha^-1 recorded higher values of above characters. However, Harvest index were failed to show any significant effect due to above treatments.